People need to be more confident to spend – not hoard – their retirement savings to improve living standards throughout their lives, without "ever more" compulsory super contributions, Superannuation Minister Jane Hume says.

In the strongest hint yet the Morrison government is strongly considering dumping the legislated rise in the superannuation guarantee to 12 per cent, Senator Hume said it would come at the expense of wages and that naysayers denying the cost to take-home pay were the "climate change deniers of the super system".